WO2016136578A1 - 光透過性フィルム - Google Patents
光透過性フィルム Download PDFInfo
- Publication number
- WO2016136578A1 WO2016136578A1 PCT/JP2016/054678 JP2016054678W WO2016136578A1 WO 2016136578 A1 WO2016136578 A1 WO 2016136578A1 JP 2016054678 W JP2016054678 W JP 2016054678W WO 2016136578 A1 WO2016136578 A1 WO 2016136578A1
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- WIPO (PCT)
- Prior art keywords
- inorganic oxide
- oxide layer
- layer
- inorganic
- light transmissive
- Prior art date
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- 229910052809 inorganic oxide Inorganic materials 0.000 claims abstract description 287
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- C23C14/205—Metallic material, boron or silicon on organic substrates by cathodic sputtering
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3457—Sputtering using other particles than noble gas ions
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/54—Controlling or regulating the coating process
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- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022466—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1884—Manufacture of transparent electrodes, e.g. TCO, ITO
- H01L31/1888—Manufacture of transparent electrodes, e.g. TCO, ITO methods for etching transparent electrodes
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- B32B2307/202—Conductive
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/702—Amorphous
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
Definitions
- the present invention relates to a light transmissive film, and more particularly to a light transmissive film suitably used for optical applications.
- a light transmissive film such as a transparent conductive film provided with a transparent conductive layer is used for optical applications such as a touch panel.
- a transparent conductive film in which a transparent oxide thin film, a silver-based thin film, and a transparent oxide thin film are formed on a glass substrate has been proposed (see, for example, Patent Document 1).
- the two transparent oxide conductive films are both formed from a mixed oxide containing indium oxide.
- Patent Document 1 in order to pattern a transparent conductive film, first, an electrode-shaped resist film is formed on the upper transparent oxide thin film, and then a portion exposed from the resist film is etched with an etching solution. Thus, a three-layer thin film is formed into an electrode shape.
- the etching rates of the two transparent oxide conductive films with respect to the etching solution are greatly different, that is, when one of the two transparent oxide conductive films is significantly faster than the other, the other transparent oxide conductive film is transparent.
- the etching time of the transparent conductive film is set so that the patterning of the conductive oxide film is completed, the overetching that erodes inward from the edge of one transparent oxide conductive film with respect to the edge of the resist film is performed. A portion (or side etched portion) is formed. In that case, it becomes difficult for the transparent conductive film to maintain its shape, and furthermore, there is a problem that an expected action (for example, a conductive action) cannot be reliably achieved.
- the etching time of the transparent conductive film is set so as to finish the patterning of one transparent oxide conductive film
- the patterning of the other transparent oxide conductive film is finished when the etching rate is significantly slower than the other.
- the other transparent oxide conductive film cannot be patterned into a desired shape.
- An object of the present invention is to provide a light-transmitting film capable of suppressing the formation of an over-etched portion while both the first inorganic oxide layer and the second inorganic oxide layer can be reliably patterned by etching. Is to provide.
- the light transmissive film of the present invention includes, in order, a transparent base material and a light transmissive inorganic layer, the transparent base material is made of a polymer film, and the light transmissive inorganic layer is a first inorganic material in order.
- the ratio (H2 / H1) of the hydrogen atom content H2 in the second inorganic oxide layer to the hydrogen atom content H1 in the first inorganic oxide layer is 0.10 or more, 10 .00 or less.
- the hydrogen atom content H1 in the first inorganic oxide layer and the hydrogen atom content H2 in the second inorganic oxide layer are both 5 ⁇ 10 19. It is preferable that it is not less than atoms / cm 3 and not more than 8,000 ⁇ 10 19 atoms / cm 3 .
- At least one of the first inorganic oxide layer and the second inorganic oxide layer contains indium oxide.
- both the first inorganic oxide layer and the second inorganic oxide layer are amorphous.
- the ratio (T2 / T1) of the thickness T2 of the second inorganic oxide layer to the thickness T1 of the first inorganic oxide layer is 0.5 or more and 1.5. It is preferable that:
- the first inorganic oxide layer and the second inorganic oxide layer further contain carbon atoms, and the content of hydrogen atoms in the first inorganic oxide layer
- the light transmissive film of the present invention it is possible to reliably pattern both the first inorganic oxide layer and the second inorganic oxide layer by etching, while suppressing the formation of the over-etched portion. it can.
- FIG. 1 shows a cross-sectional view of an embodiment of the light transmissive film of the present invention.
- FIG. 2 is a sectional view of a light transmissive film in which the light transmissive inorganic layer shown in FIG. 1 is formed in a wiring pattern.
- FIG. 3 shows an example of a cross-sectional view of the light transmissive film of Comparative Example 1 in which a light transmissive inorganic layer is formed in a wiring pattern and an over-etched portion is formed in the first inorganic oxide layer.
- FIG. 1 shows a cross-sectional view of an embodiment of the light transmissive film of the present invention.
- FIG. 2 is a sectional view of a light transmissive film in which the light transmissive inorganic layer shown in FIG. 1 is formed in a wiring pattern.
- FIG. 3 shows an example of a cross-sectional view of the light transmissive film of Comparative Example 1 in which a light transmissive inorganic layer is formed in a wiring pattern and an over
- FIG. 4 shows an example of a cross-sectional view of a light transmissive film corresponding to a comparative example in which a light transmissive inorganic layer is formed in a wiring pattern and an over-etched portion is formed in the second inorganic oxide layer.
- FIG. 5 is a modification of the light transmissive film, and shows a cross-sectional view of the light transmissive film in which the first inorganic oxide layer is directly disposed on the upper surface of the transparent substrate.
- FIG. 6 is a modification of the light transmissive film, and shows a cross-sectional view of the light transmissive film in which the inorganic layer is interposed between the protective layer and the first inorganic oxide layer.
- the vertical direction of the paper is the vertical direction (thickness direction, first direction)
- the upper side of the paper is the upper side (one side in the thickness direction, the first direction)
- the lower side of the paper is the lower side (thickness direction).
- the left-right direction on the paper surface is the left-right direction (width direction, second direction orthogonal to the first direction)
- the left side on the paper surface is the left side (second side in the second direction)
- the right side on the paper surface is the right side (the other side in the second direction).
- the paper thickness direction is the front-rear direction (a third direction orthogonal to the first direction and the second direction), the front side of the paper is the front side (the third direction one side), and the back side of the paper surface is the rear side (the third direction). The other side). Specifically, it conforms to the direction arrow in each figure.
- the light transmissive film 1 has a film shape (including a sheet shape) having a predetermined thickness, and extends in a predetermined direction (front and rear direction and left and right direction, that is, a surface direction) orthogonal to the thickness direction. A flat upper surface and a flat lower surface (two main surfaces).
- the light transmissive film 1 is, for example, a component such as a base material for a touch panel or a light control panel provided in an optical device (for example, an image display device or a light control device), that is, not an optical device.
- the light transmissive film 1 is a component for producing an optical device or the like, does not include an image display element such as an LCD module, and a light source such as an LED, and is a device that can be distributed industrially and used industrially. It is.
- the light transmissive film 1 includes a transparent conductive film.
- the light transmissive film 1 is a light transmissive laminated film including a transparent substrate 2, a protective layer 3, and a light transmissive inorganic layer 4 in this order. That is, the light transmissive film 1 includes a transparent substrate 2, a protective layer 3 disposed on the transparent substrate 2, and a light transmissive inorganic layer 4 disposed on the protective layer 3. Further, preferably, the light transmissive film 1 is composed of only the transparent substrate 2, the protective layer 3, and the light transmissive inorganic layer 4.
- each layer will be described in detail.
- the transparent substrate 2 is the lowermost layer of the light transmissive film 1 and is a support material that ensures the mechanical strength of the light transmissive film 1.
- the transparent substrate 2 supports the light transmissive inorganic layer 4 together with the protective layer 3.
- the transparent substrate 2 is made of a polymer film.
- the polymer film has transparency.
- the material of the polymer film include polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate, for example, (meth) acrylic resins (acrylic resin and / or methacrylic resin) such as polymethacrylate, And olefin resins such as polyethylene, polypropylene, and cycloolefin polymers such as polycarbonate resin, polyether sulfone resin, polyarylate resin, melamine resin, polyamide resin, polyimide resin, cellulose resin, polystyrene resin, norbornene resin, and the like. These polymer films can be used alone or in combination of two or more. From the viewpoints of transparency, heat resistance, mechanical properties, etc., preferably, olefin resins and polyester resins are used, and more preferably, cycloolefin polymers and PET are used.
- the thickness of the transparent substrate 2 is, for example, 2 ⁇ m or more, preferably 20 ⁇ m or more, and for example, 300 ⁇ m or less, preferably 200 ⁇ m or less, more preferably 150 ⁇ m or less.
- the transparent substrate 2 preferably contains water from the viewpoint of maintaining the amorphousness of the first inorganic oxide layer 5 and the second inorganic oxide layer 7. That is, in the transparent substrate 2, the polymer film contains water.
- the protective layer 3 is a scratch protective layer for making it difficult to cause scratches on the upper surface of the light-transmitting inorganic layer 4 (that is, to obtain excellent scratch resistance).
- the protective layer 3 is formed so that the difference between the non-pattern part 9 and the pattern part 10 is not recognized after the light-transmitting inorganic layer 4 is formed in the wiring pattern in a later process.
- It is also an optical adjustment layer that adjusts the optical properties of the light transmissive film 1 (so as to suppress the visual recognition of the wiring pattern).
- the protective layer 3 has a film shape (including a sheet shape), and is disposed on the entire upper surface of the transparent substrate 2 so as to be in contact with the upper surface of the transparent substrate 2.
- the protective layer 3 is prepared from a resin composition.
- Resin composition contains, for example, resin and particles.
- the resin composition preferably contains only a resin, and more preferably consists only of a resin.
- the resin examples include a curable resin, a thermoplastic resin (for example, a polyolefin resin), and preferably a curable resin.
- the curable resin examples include an active energy ray-curable resin that is cured by irradiation with active energy rays (specifically, ultraviolet rays, electron beams, etc.), for example, a thermosetting resin that is cured by heating, and the like.
- active energy ray curable resin is used.
- Examples of the active energy ray-curable resin include a polymer having a functional group having a polymerizable carbon-carbon double bond in the molecule.
- Examples of such a functional group include a vinyl group and a (meth) acryloyl group (methacryloyl group and / or acryloyl group).
- Examples of the active energy ray-curable resin include (meth) acrylic resin (acrylic resin and / or methacrylic resin) containing a functional group in the side chain.
- These resins can be used alone or in combination of two or more.
- Examples of the particles include inorganic particles and organic particles.
- Examples of the inorganic particles include silica particles, for example, metal oxide particles made of zirconium oxide, titanium oxide, and the like, for example, carbonate particles such as calcium carbonate.
- Examples of the organic particles include crosslinked acrylic resin particles.
- the thickness of the protective layer 3 is, for example, 0.1 ⁇ m or more, preferably 1 ⁇ m or more, and for example, 10 ⁇ m or less, preferably 5 ⁇ m or less.
- the thickness of the protective layer 3 is measured by, for example, cross-sectional observation with a transmission electron microscope (TEM).
- the light-transmissive inorganic layer 4 is a conductive layer for forming the pattern portion 10 by forming it in a wiring pattern in a later step, as shown in FIG.
- the light transmissive inorganic layer 4 includes a transparent conductive layer.
- the light-transmitting inorganic layer 4 is the uppermost layer of the light-transmitting film 1 and has a film shape (including a sheet shape). It arrange
- the light-transmitting inorganic layer 4 includes a first inorganic oxide layer 5, a metal layer 6, and a second inorganic oxide layer 7 in order. That is, the light-transmitting inorganic layer 4 includes the first inorganic oxide layer 5 disposed on the protective layer 3, the metal layer 6 disposed on the first inorganic oxide layer 5, and the metal layer 6. And a second inorganic oxide layer 7 disposed thereon.
- the light transmissive inorganic layer 4 is preferably composed of only the first inorganic oxide layer 5, the metal layer 6, and the second inorganic oxide layer 7.
- the first inorganic oxide layer 5 is a conductive layer that imparts conductivity to the light transmissive inorganic layer 4 together with a metal layer 6 and a second inorganic oxide layer 7 described later. Further, the first inorganic oxide layer 5 prevents hydrogen derived from water contained in the transparent substrate 2 and carbon derived from organic substances contained in the protective layer 3 from invading the metal layer 6. It is also a barrier layer. Furthermore, the 1st inorganic oxide layer 5 suppresses the visible light reflectance of the metal layer 6 with the 2nd inorganic oxide layer 7 mentioned later, and improves the visible light transmittance of the light transmissive inorganic layer 4 It is also an optical adjustment layer.
- the first inorganic oxide layer 5 is the lowermost layer in the light-transmitting inorganic layer 4 and has a film shape (including a sheet shape).
- the first inorganic oxide layer 5 is formed on the entire upper surface of the protective layer 3 and on the upper surface of the protective layer 3. It is arranged to come into contact.
- the first inorganic oxide layer 5 contains as a main component an inorganic oxide that can be dissolved in an etching solution described later.
- the inorganic oxide examples include at least one metal selected from the group consisting of In, Sn, Zn, Ga, Sb, Ti, Si, Zr, Mg, Al, Au, Ag, Cu, Pd, and W. Examples thereof include metal oxides to be formed. If necessary, the metal oxide can be further doped with a metal atom shown in the above group.
- the inorganic oxide preferably includes an indium oxide-containing oxide from the viewpoint of reducing the specific resistance and securing excellent transparency, and more preferably an indium tin composite oxide (ITO). Can be mentioned.
- ITO indium tin composite oxide
- the content of tin oxide (SnO 2 ) contained in ITO is, for example, 0.5% by mass or more, preferably 3% by mass or more with respect to the total amount of tin oxide and indium oxide (In 2 O 3 ). More preferably, it is 6% by mass or more, more preferably 8% by mass or more, particularly preferably 10% by mass or more, most preferably more than 10% by mass, and for example, 35% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 13% by mass or less.
- the content of indium oxide (In 2 O 3 ) is the remainder of the content of tin oxide (SnO 2 ).
- the inorganic oxide may be crystalline or amorphous. As shown in FIG. 2, the inorganic oxide is preferably amorphous from the viewpoint of easily performing patterning in a later step.
- the content ratio of the inorganic oxide in the first inorganic oxide layer 5 is, for example, 95% by mass or more, preferably 98% by mass or more, more preferably 99% by mass or more, and for example, less than 100% by mass. It is.
- the first inorganic oxide layer 5 contains hydrogen atoms.
- the hydrogen atoms are not derived from the inorganic oxide contained as the main component in the first inorganic oxide layer 5, for example, and water (H 2 O) or a dry apparatus (which is included in the polymer film of the transparent substrate 2). Specifically, it is derived from water (H 2 O) adsorbed in a vacuum apparatus such as a sputtering apparatus (described in detail in a later production method).
- the hydrogen atom content H1 in the first inorganic oxide layer 5 is, for example, 5 ⁇ 10 19 atoms / cm 3 or more, preferably 10 ⁇ 10 19 atoms / cm 3 or more, and more preferably 50 ⁇ 10 19 atoms. / Cm 3 or more, more preferably 100 ⁇ 10 19 atoms / cm 3 or more, for example, 8,000 ⁇ 10 19 atoms / cm 3 or less, preferably 4000 ⁇ 10 19 atoms / cm 3 or less, More preferably, it is 800 ⁇ 10 19 atoms / cm 3 or less.
- the film quality of the first inorganic oxide layer 5 can be prevented from being deteriorated in a moist heat environment.
- the hydrogen atom content H1 in the first inorganic oxide layer 5 is equal to or higher than the lower limit described above, crystallization of the first inorganic oxide layer 5 over time can be suppressed, and good etching properties can be obtained. Can be maintained.
- the first inorganic oxide layer 5 contains carbon atoms.
- the carbon atom is not derived from the above-described inorganic oxide, but is derived from an organic substance contained in the above-described protective layer 3.
- the carbon atom content C1 in the first inorganic oxide layer 5 is such that the total content (H1 + C1) of the hydrogen atom content H1 and the carbon atom content C1 in the first inorganic oxide layer 5 is, for example, 6 ⁇ 10 19 atoms / cm 3 or more, preferably 10 ⁇ 10 19 atoms / cm 3 or more, more preferably 20 ⁇ 10 19 atoms / cm 3 or more, more preferably 100 ⁇ 10 19 atoms / cm 3 or more, Further, for example, it is adjusted so as to be 10,000 ⁇ 10 19 atoms / cm 3 or less, preferably 5000 ⁇ 10 19 atoms / cm 3 or less, more preferably 1000 ⁇ 10 19 atoms / cm 3 or less. .
- the etching property of the first inorganic oxide layer 5 can be improved.
- the carbon atom content C1 in the first inorganic oxide layer 5 is, for example, 1 ⁇ 10 19 atoms / cm 3 or more, preferably 3 ⁇ 10 19 atoms / cm 3 or more, more preferably 10 ⁇ 10 19 atoms / cm 3 or more, for example, 100 ⁇ 10 19 atoms / cm 3 or less, preferably 50 ⁇ 10 19 atoms / cm 3 or less, more preferably 30 ⁇ 10 19 atoms / cm 3 It is as follows.
- the carbon atom content C1 in the first inorganic oxide layer 5 is measured by secondary ion mass spectrometry with respect to the central portion in the thickness direction of the first inorganic oxide layer 5.
- the thickness T1 of the first inorganic oxide layer 5 is, for example, 5 nm or more, preferably 20 nm or more, more preferably 30 nm or more, and for example, 60 nm or less, preferably 50 nm or less.
- the thickness T1 of the first inorganic oxide layer 5 is measured by, for example, cross-sectional observation with a transmission electron microscope (TEM).
- the metal layer 6 is a conductive layer that imparts conductivity to the light transmissive inorganic layer 4 together with the first inorganic oxide layer 5 and the second inorganic oxide layer 7.
- the metal layer 6 is also a low specific resistance layer that reduces the specific resistance of the light transmissive inorganic layer 4.
- the metal layer 6 has a film shape (including a sheet shape), and is disposed on the upper surface of the first inorganic oxide layer 5 so as to be in contact with the upper surface of the first inorganic oxide layer 5.
- the metal forming the metal layer 6 is, for example, a metal having a small specific resistance and a metal that can be dissolved in the same etching solution as the etching solution for etching the first inorganic oxide layer 5.
- the metal material for example, Ti, Si, Nb, In, Zn, Sn, Au, Ag, Cu, Al, Co, Cr, Ni, Pb, Pd, Pt, Cu, Ge, Ru, Nd
- the alloy include one metal selected from the group consisting of Mg, Ca, Na, W, Zr, Ta, and Hf, or an alloy containing two or more metals.
- the metal is preferably silver (Ag) or a silver alloy, more preferably a silver alloy. If the metal is silver or a silver alloy, the resistance value of the light-transmitting inorganic layer 4 can be reduced, and in addition, the light transmittance has a particularly high average reflectance in the near-infrared region (wavelength 850 to 250 nm).
- the inorganic layer 4 is obtained, and can be suitably applied to an image quality display device used outdoors.
- the silver alloy contains silver as a main component and other metals as subcomponents. Specifically, for example, an Ag—Pd alloy, an Ag—Pd—Cu alloy, an Ag—Pd—Cu—Ge, for example. Alloy, Ag-Cu-Au alloy, Ag-Cu-Sn alloy, Ag-Ru-Cu alloy, Ag-Ru-Au alloy, Ag-Nd alloy, Ag-Mg alloy, Ag-Ca alloy, Ag-Na alloy, etc. Is mentioned. From the viewpoint of humidification durability, the silver alloy is preferably a Cu-containing Ag alloy (eg, Ag—Cu alloy, Ag—Cu—Sn alloy, etc.), a Pd-containing Ag (eg, Ag—Pd alloy, etc.) alloy, Cu, or the like. Pd-containing Ag alloys (for example, Ag—Pd—Cu alloys).
- Ag—Pd—Cu alloys for example, Ag—Pd—Cu alloys.
- the silver content in the silver alloy (preferably, Ag—Pd alloy) is, for example, 80% by mass or more, preferably 90% by mass or more, more preferably 95% by mass or more. It is 9 mass% or less.
- the content ratio of the other metals in the silver alloy is the balance of the silver content ratio described above.
- the content ratio of Pd in the Ag—Pd alloy is specifically, for example, 0.1% by mass or more, and for example, 10% by mass or less, preferably 5 mass% or less, More preferably, it is 1 mass% or less.
- the thickness of the metal layer 6 is, for example, 1 nm or more, preferably 5 nm or more, and, for example, 20 nm or less, preferably 10 nm or less, from the viewpoint of increasing the transmittance of the light-transmitting inorganic layer 4.
- the second inorganic oxide layer 7 is a conductive layer that imparts conductivity to the light transmissive inorganic layer 4 together with the first inorganic oxide layer 5 and the metal layer 6.
- the second inorganic oxide layer 7 is also a barrier layer that prevents oxygen, moisture, and the like in the environment from invading the metal layer 6, and suppresses the visible light reflectance of the metal layer 6 and transmits light. It is also an optical adjustment layer for improving the visible light transmittance of the inorganic layer 4.
- the second inorganic oxide layer 7 is the uppermost layer of the light transmissive inorganic layer 4 and has a film shape (including a sheet shape).
- the second inorganic oxide layer 7 is formed on the entire upper surface of the metal layer 6 and on the upper surface of the metal layer 6. It is arranged to come into contact.
- the second inorganic oxide layer 7 contains the inorganic oxide exemplified in the first inorganic oxide layer 5, and specifically, with respect to the same etching solution as the etching that etches the first inorganic oxide layer 5.
- the content ratio of the inorganic oxide in the second inorganic oxide layer 7 is, for example, 95% by mass or more, preferably 98% by mass or more, more preferably 99% by mass or more, and for example, less than 100% by mass. It is.
- the second inorganic oxide layer 7 contains a hydrogen atom.
- the hydrogen atoms are not derived from, for example, the inorganic oxide contained as the main component in the second inorganic oxide layer 7, and water (H 2 O) contained in the polymer film of the transparent substrate 2 or a dry apparatus ( Specifically, it is derived from water (H 2 O) adsorbed in a vacuum apparatus such as a sputtering apparatus (described in detail in a later production method).
- the hydrogen atom content H2 in the second inorganic oxide layer 7 is the ratio of the hydrogen atom content H2 in the second inorganic oxide layer 7 to the hydrogen atom content H1 in the first inorganic oxide layer 5 (H2 / H1) is set to be 0.10 or more and 10.00 or less.
- the hydrogen atom ratio (H2 / H1) is less than 0.10, the hydrogen atom content H1 in the first inorganic oxide layer 5 is equal to the hydrogen atom content H2 in the second inorganic oxide layer 7. On the other hand, it is too high. Therefore, in the etching of the light-transmitting inorganic layer 4 described later, the etching rate R1 for the etching solution of the first inorganic oxide layer 5 is excessively higher than the etching rate R2 for the etching solution of the second inorganic oxide layer 7. fast. As a result, as shown in FIG. 3, the overetched portion 11 is formed at the end of the first inorganic oxide layer 5 in the etching of the light transmissive inorganic layer 4.
- the over-etched portion 11 has a substantially triangular cross section.
- the shape of the over-etched portion 11 is not limited to the shape shown in FIG.
- the cross sections of both end portions of the over-etched first inorganic oxide layer 5 may have a shape that is perpendicular to the surface direction of the metal layer 6.
- the hydrogen atom content H2 in the second inorganic oxide layer 7 is relative to the hydrogen atom content H1 in the first inorganic oxide layer 5.
- the etching rate R ⁇ b> 2 for the etching solution of the second inorganic oxide layer 7 is excessively faster than the etching rate R ⁇ b> 1 for the etching solution of the first inorganic oxide layer 5.
- the overetched portion 11 is formed at the end of the second inorganic oxide layer 7 in the etching of the light transmissive inorganic layer 4.
- the hydrogen atom content H2 in the second inorganic oxide layer 7 is a ratio of the hydrogen atom content H2 in the second inorganic oxide layer 7 to the hydrogen atom content H1 in the first inorganic oxide layer 5.
- (H2 / H1) is preferably 0.20 or more, more preferably 0.40 or more, still more preferably 0.50 or more, still more preferably 0.75 or more, and preferably 5.00.
- it is set so that it is preferably 2.50 or less, more preferably 1.50 or less, particularly preferably 1.25 or less, and most preferably 1.20 or less.
- the overetched portion 11 is suppressed from being formed at the end of the first inorganic oxide layer 5 when the light-transmitting inorganic layer 4 is etched. be able to.
- the ratio (H2 / H1) is less than or equal to the above upper limit, when the light-transmitting inorganic layer 4 is etched, the over-etched portion 11 is formed at the end of the second inorganic oxide layer 7. Can be suppressed.
- the ratio (H2 / H1) is not less than the above lower limit and not more than the above upper limit, the etching rate R1 with respect to the etchant of the first inorganic oxide layer 5 and the etchant of the second inorganic oxide layer 7 will be described. Can be approximated to the etching rate R2. Therefore, it is possible to suppress the overetched portion 11 from being formed in either the first inorganic oxide layer 5 or the second inorganic oxide layer 7.
- the ratio (H2 / H1) of the hydrogen atom content H2 in the second inorganic oxide layer 7 to the hydrogen atom content H1 in the first inorganic oxide layer 5 is as follows. It adjusts in the manufacturing method of 2 inorganic oxide layers 7.
- the content H2 of hydrogen atoms in the second inorganic oxide layer 7 is, for example, 5 ⁇ 10 19 atoms / cm 3 or more, preferably 10 ⁇ 10 19 atoms / cm 3 or more, preferably 100 ⁇ 10 19 atoms / cm 3 or more, and for example, 8,000 ⁇ 10 19 atoms / cm 3 or less, preferably 4000 ⁇ 10 19 atoms / cm 3 or less, more preferably 800 ⁇ 10 19 atoms / cm 3 or less, more preferably 300 ⁇ 10 19 atoms / cm 3 or less.
- the hydrogen atom content H2 in the second inorganic oxide layer 7 is equal to or less than the above-described upper limit, deterioration of the film quality of the second inorganic oxide layer 7 in a moist heat environment can be prevented. If the hydrogen atom content H2 in the second inorganic oxide layer 7 is equal to or greater than the lower limit, crystallization of the second inorganic oxide layer 7 over time can be suppressed, and good etching properties can be maintained. .
- the hydrogen atom content H2 in the second inorganic oxide layer 7 is measured by secondary ion mass spectrometry with respect to the central portion in the thickness direction of the second inorganic oxide layer 7.
- the second inorganic oxide layer 7 contains carbon atoms.
- the carbon atom is not derived from the above-described inorganic oxide, but is derived from an organic substance (described in detail in a later production method) contained in the polymer film of the above-described transparent substrate 2.
- the carbon atom content C2 in the second inorganic oxide layer 7 is such that the total content (H2 + C2) of the hydrogen atom content H2 and the carbon atom content C2 in the second inorganic oxide layer 7 is, for example, 6 ⁇ 10 19 atoms / cm 3 or more, preferably 10 ⁇ 10 19 atoms / cm 3 or more, more preferably 20 ⁇ 10 19 atoms / cm 3 or more, more preferably 100 ⁇ 10 19 atoms / cm 3 or more Yes, for example, adjusted so as to be 10,000 ⁇ 10 19 atoms / cm 3 or less, preferably 5000 ⁇ 10 19 atoms / cm 3 or less, more preferably 1000 ⁇ 10 19 atoms / cm 3 or less. Is done.
- the second inorganic oxide layer 7 having excellent wet heat durability can be obtained. If total content (H2 + C2) is more than an above-mentioned minimum, the 2nd inorganic oxide layer 7 excellent in etching property can be obtained.
- the carbon atom content C2 in the second inorganic oxide layer 7 is, for example, 1 ⁇ 10 19 atoms / cm 3 or more, preferably 2 ⁇ 10 19 atoms / cm 3 or more, and more preferably.
- Is 3 ⁇ 10 19 atoms / cm 3 or more for example, 100 ⁇ 10 19 atoms / cm 3 or less, preferably 50 ⁇ 10 19 atoms / cm 3 or less, more preferably 30 ⁇ 10 19 atoms / cm 3 or less.
- / Cm 3 or less more preferably 10 ⁇ 10 19 atoms / cm 3 or less.
- Hydrogen atom content H1 and carbon atom content in the first inorganic oxide layer 5 of the total content (H2 + C2) of the hydrogen atom content H2 and the carbon atom content C2 in the second inorganic oxide layer 7 The ratio “(H2 + C2) / (H1 + C1)” with respect to the total content (H1 + C1) with the amount C1 is preferably larger than the ratio of hydrogen atoms (H2 / H1), and ⁇ (H2 + C2) / (H1 + C1) ⁇ / ( The value of H2 / H1) is, for example, 1.01 or more, preferably 1.03 or more, for example, 3.00 or less, preferably 2.00 or less, more preferably 1. 50 or less.
- the second inorganic oxide layer 7 disposed on the side in contact with the atmosphere is likely to be a crystalline film due to oxygen in the atmosphere, but in addition to the presence of a sufficient amount of hydrogen atoms. Further, by containing more carbon atoms, the amorphous property is maintained, and the etching property tends to be ensured. The reason for this is not limited to any theory, but it is presumed that carbon atoms have a larger atomic size than hydrogen atoms and are likely to inhibit crystallization of the inorganic oxide layer.
- the thickness T2 of the second inorganic oxide layer 7 has a ratio (T2 / T1) of the thickness T2 of the second inorganic oxide layer to the thickness T1 of the first inorganic oxide layer, for example, 0.5 or more, preferably 0.75 or more, and for example, 1.5 or less, preferably 1.25 or less.
- the ratio (T2 / T1) is not less than the above lower limit and not more than the above upper limit, the deterioration of the metal layer 6 can be suppressed even in a humid heat environment.
- the thickness T2 of the second inorganic oxide layer 7 is, for example, 5 nm or more, preferably 20 nm or more, more preferably 30 nm or more, and for example, 60 nm or less, preferably 50 nm or less. is there.
- the thickness T2 of the second inorganic oxide layer 7 is in the above range, the visible light transmittance of the light transmissive inorganic layer 4 can be easily adjusted to a high level.
- the thickness of the light transmissive inorganic layer 4, that is, the total thickness of the first inorganic oxide layer 5, the metal layer 6 and the second inorganic oxide layer 7 is, for example, 20 nm or more, preferably 40 nm or more. Is 60 nm or more, more preferably 80 nm or more, and for example, 150 nm or less, preferably 120 nm or less, more preferably 100 nm or less.
- the protective layer 3, the first inorganic oxide layer 5, the metal layer 6, and the second inorganic oxide layer 7 are formed on the transparent substrate 2. Arrange (stack) in the above order.
- a transparent substrate 2 is prepared.
- the water content in the prepared transparent substrate 2 is, for example, 10 ⁇ g / cm 2 or more, preferably 15 ⁇ g / cm 2 or more, and for example, 200 ⁇ g / cm 2 or less, preferably 170 ⁇ g / cm 2. cm 2 or less. If the moisture content is equal to or more than the lower limit described above, it is easy to suppress the crystallinity of the first inorganic oxide layer 5 and the second inorganic oxide layer 7 to be formed later from changing greatly over time. On the other hand, if the water content is not more than the above upper limit, the difference between the hydrogen atom content H2 in the second inorganic oxide layer 7 and the hydrogen atom content H1 in the first inorganic oxide layer 5 is increased. It is easy to suppress.
- the amount of water in the transparent substrate 2 is measured according to JIS K 7251 (2002) Method B-water vaporization method.
- the content of water contained in the transparent substrate 2 (polymer film) with respect to the transparent substrate 2 is, for example, 0.05% by mass or more, preferably 0.1% by mass or more. For example, it is 1.5 mass% or less, preferably 1.0 mass% or less, more preferably 0.5 mass% or less.
- the resin composition is disposed on the upper surface of the transparent substrate 2 by, for example, wet processing.
- the resin composition is applied to the upper surface of the transparent substrate 2. Thereafter, when the resin composition contains an active energy ray-curable resin, the active energy ray is irradiated.
- a film-shaped protective layer 3 is formed on the entire upper surface of the transparent substrate 2. That is, the transparent base material 12 with a protective layer provided with the transparent base material 2 and the protective layer 3 is obtained.
- the protective layer 3 contains an organic substance in an appropriate ratio.
- the transparent substrate 12 with a protective layer is degassed if necessary.
- the transparent substrate 12 with a protective layer is, for example, 1 ⁇ 10 ⁇ 1 Pa or less, preferably 1 ⁇ 10 ⁇ 2 Pa or less, It is left in a reduced pressure atmosphere of ⁇ 10 ⁇ 3 Pa or less, preferably 5 ⁇ 10 ⁇ 4 Pa or less.
- the degassing treatment is performed using an exhaust device (specifically, including a turbo molecular pump or the like) provided in a dry-type device described in detail later.
- the light transmissive inorganic layer 4 is disposed on the upper surface of the protective layer 3 by, for example, a dry method.
- each of the first inorganic oxide layer 5, the metal layer 6, and the second inorganic oxide layer 7 is sequentially disposed by a dry method.
- Examples of the dry method include a vacuum deposition method, a sputtering method, and an ion plating method.
- a sputtering method is used.
- a magnetron sputtering method can be mentioned.
- the gas used in the sputtering method examples include an inert gas such as Ar.
- reactive gas such as oxygen, can be used together as needed.
- the flow rate ratio of the reactive gas is not particularly limited, and is a ratio of the reactive gas flow rate to the inert gas flow rate, for example, 0.1 / 100 or more, preferably 1/100 or more, and for example, 5/100 or less.
- an inert gas and a reactive gas are preferably used in combination as the gas.
- an inert gas is preferably used alone as the gas.
- an inert gas and a reactive gas are preferably used in combination as the gas.
- the power source used in the sputtering method is not limited, and may be any of a DC power source, an MF / AC power source, an RF power source, or a combination thereof.
- the transparent substrate 2 (and the protective layer 3) is cooled. Specifically, the lower surface of the transparent substrate 2 (that is, the surface on the side opposite to the surface on which the first inorganic oxide layer 5 is formed in the transparent substrate 2 (that is, the surface opposite to the upper surface of the transparent substrate 2)). Then, the transparent substrate 2 (and the protective layer 3) is cooled by contacting with a cooling device (for example, a cooling roll). Thereby, when the first inorganic oxide layer 5 is formed, a large amount of water contained in the transparent substrate 2 and the organic matter contained in the protective layer 3 are released by heat of vapor deposition caused by sputtering, and the like.
- a cooling device for example, a cooling roll
- the cooling temperature is, for example, ⁇ 30 ° C. or more, preferably ⁇ 10 ° C. or more, and for example, 60 ° C. or less, preferably 40 ° C. or less, more preferably 20 ° C. or less.
- the light transmissive inorganic layer 4 in which the first inorganic oxide layer 5, the metal layer 6, and the second inorganic oxide layer 7 are sequentially formed is formed on the protective layer 3.
- the surface resistance value of the light transmissive inorganic layer 4 is, for example, 40 ⁇ / ⁇ or less, preferably 30 ⁇ / ⁇ or less, more preferably 20 ⁇ / ⁇ or less, and further preferably 15 ⁇ / ⁇ or less. Yes, for example, 0.1 ⁇ / ⁇ or more, preferably 1 ⁇ / ⁇ or more, more preferably 5 ⁇ / ⁇ or more.
- the specific resistance of the light transmissive inorganic layer 4 is, for example, 2.5 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less, preferably 2.0 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less, and more preferably 1.5 ⁇ 10 ⁇ 4 ⁇ ⁇ cm.
- ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less more preferably 1.1 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less, for example, 0.01 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more, preferably 0. It is 1 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more, more preferably 0.5 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more.
- the specific resistance of the light-transmitting inorganic layer 4 includes the thickness of the light-transmitting inorganic layer 4 (the total thickness of the first inorganic oxide layer, the metal layer 6 and the second inorganic oxide layer 7) and the light-transmitting inorganic layer 4 It is calculated using the surface resistance value.
- the light-transmitting inorganic layer 4 preferably has a high average reflectance of near infrared rays (wavelength 850 to 2500 nm).
- the light-transmitting inorganic layer 4 including the metal layer 6 (for example, a metal layer 6 containing silver or a silver alloy) having a high reflectance in the near-infrared region is, for example, transparent made of a conductive oxide (for example, ITO).
- ITO conductive oxide
- the present invention can also be suitably applied to an image display device used in an environment where the panel temperature is likely to rise (for example, outdoors).
- the average reflectance of the near-infrared ray (wavelength 850 to 2500 nm) of the light transmissive inorganic layer 4 is, for example, 10% or more, preferably 20% or more, more preferably 40% or more, and still more preferably. Is 50% or more, for example, 95% or less, and preferably 90% or less.
- the method of setting the ratio (H2 / H1) of the hydrogen atom content H2 in the second inorganic oxide layer 7 to the hydrogen atom content H1 in the first inorganic oxide layer 5 within the above range is not limited. However, it is preferable to select at least one of the following (1) to (2).
- water water vapor
- a mixed gas containing water vapor and inert gas prepared by passing an inert gas through a distilled water storage tank installed outside the apparatus is put into a dry apparatus. Introduce. Thereby, water can be easily introduced. Further, a plurality of gas introduction paths are provided, and a mixed gas containing water vapor and an inert gas and an inert gas (a gas not containing water vapor) are introduced through different paths, and the introduction ratio is appropriately changed.
- the amount of water introduced during the formation of the first inorganic oxide layer 5 and the second inorganic oxide layer 7 is, for example, 0.01 / 100 or more, preferably the ratio of the flow rate of water vapor to the flow rate of inert gas. It is 0.1 / 100 or more, more preferably 0.5 / 100 or more, further preferably 1/100 or more, for example, 20/100 or less, more preferably 10/100 or less.
- the amount of water introduced during the formation of the first inorganic oxide layer 5 and the second inorganic oxide layer 7 is:
- the ratio of the flow rate of the mixed gas including the inert gas to the flow rate of the inert gas is, for example, 1/100 or more, preferably 10/100 or more, more preferably 15/100 or more, for example, 80 / 100 or less and 50/100 or less.
- the second inorganic oxide layer 7 preferably has a larger amount of water introduced at the time of formation than the first inorganic oxide layer 5, and the amount of water introduced when the second inorganic oxide layer 7 is formed.
- the ratio to the amount of water introduced when forming the first inorganic oxide layer 5 (the amount of water introduced when forming the second inorganic oxide layer 7 / when forming the first inorganic oxide layer 5) For example, 110/100 or more, preferably 120/100 or more, and more preferably 150/100 or more.
- each of the hydrogen atom content H1 in the first inorganic oxide layer 5 and the hydrogen atom content H2 in the second inorganic oxide layer 7 can be easily controlled. .
- Time from the start of the formation of the light-transmitting inorganic layer 4 to the completion thereof, specifically, the formation of the second inorganic oxide layer 7 from the start of the formation of the first inorganic oxide layer 5 Is set to a short time, specifically, for example, 15 minutes or less, preferably 10 minutes or less, more preferably 5 minutes or less, still more preferably 3 minutes or less, It is set to 2 seconds or more, preferably 30 seconds or more.
- a light transmissive property comprising a transparent substrate 2, a protective layer 3, a first inorganic oxide layer 5, a metal layer 6, and a second inorganic oxide layer 7 in this order.
- Film 1 is obtained.
- the light transmissive film 1 includes the light transmissive inorganic layer 4 including the optical adjustment layers (the first inorganic oxide layer 5 and the second inorganic oxide layer 7) on the upper surface and the lower surface of the metal layer 6, the light transmissive film 1. Even if the inorganic layer 4 includes a metal layer 6 having a generally high visible light reflectance (specifically, for example, a metal layer 6 having a reflectance of 15% or more, further 30% or more at a wavelength of 550 nm). High visible light transmittance can be realized.
- the visible light transmittance of the light transmissive film 1 is, for example, 60% or more, preferably 70% or more, more preferably 80% or more, and further preferably 85% or more. Preferably, it is more than 86%, for example, 95% or less.
- the total thickness of the light transmissive film 1 is, for example, 2 ⁇ m or more, preferably 20 ⁇ m or more, for example, 300 ⁇ m or less, preferably 200 ⁇ m or less, and more preferably 150 ⁇ m or less.
- the above-described manufacturing method can be performed by a roll-to-roll method.
- a part or all can also be implemented by a batch system.
- the light transmitting inorganic layer 4 is formed into a wiring pattern by etching.
- the non-pattern part 9 and the pattern part 10 are formed on the protective layer 3.
- the upper surface of the protective layer 3 is exposed from the pattern part 10.
- the photosensitive film is disposed on the entire upper surface of the second inorganic oxide layer 7, and then, as shown in FIG. 2, patterns corresponding to the non-pattern part 9 and the pattern part 10 are formed.
- the photosensitive film corresponding to the non-pattern part 9 is removed by exposing through the photomask which it has, and developing after that. Thereby, an etching resist 8 having the same pattern as the pattern portion 10 is formed on the upper surface of the light-transmitting inorganic layer 4 to be the pattern portion 10.
- the light-transmitting inorganic layer 4 exposed from the etching resist 8 is etched using an etching solution.
- an etchant As an etchant, at least the first inorganic oxide layer 5 and the second inorganic oxide layer 7 are dissolved, preferably the first inorganic oxide layer 5, the metal layer 6 and the second inorganic oxide layer 7 are dissolved.
- the composition is not limited as long as it is an etchant that can produce an acid such as hydrochloric acid, sulfuric acid, nitric acid, acetic acid, succinic acid, phosphoric acid, and mixed acids thereof.
- the second inorganic oxide layer 7, the metal layer 6, and the first inorganic oxide layer 5 corresponding to the non-pattern part 9 are removed.
- the light-transmitting inorganic layer 4 is formed in a wiring pattern having the stripe-shaped pattern portion 10.
- the pattern portion 10 extends in the front-rear direction, and a plurality of the pattern portions 10 are arranged in the left-right direction at intervals (non-pattern portions 9).
- the width L of each pattern unit 10 is, for example, not less than 1 ⁇ m and not more than 3000 ⁇ m.
- An interval S between adjacent pattern portions 10 is, for example, 1 ⁇ m or more and 3000 ⁇ m or less.
- the etching resist 8 is removed from the upper surface of the second inorganic oxide layer 7 by, for example, peeling.
- the light transmissive film 1 is provided in an optical device, for example.
- optical device examples include an image display device and a light control device.
- the light transmissive film 1 is used as a base material for a touch panel, for example.
- the touch panel format include various systems such as an optical system, an ultrasonic system, a capacitive system, and a resistive film system, and the touch panel is particularly preferably used for a capacitive touch panel.
- the light transmissive film 1 can be used as, for example, a near-infrared reflecting base material.
- the image display device by providing the image display device with the light transmissive film 1 having a high average reflectance (for example, 10% or more) of near infrared rays having a wavelength of 850 to 2500 nm, the image display device can be suitably applied to an image quality display device for outdoor use.
- the light transmissive film 1 can also be provided in an image display device, for example, as a light transmissive inorganic layer laminated polarizing film bonded to a polarizing film.
- the light transmissive film 1 is provided in a light control device (specifically, a light control device having a light source such as an LED), the light transmissive film 1 is provided as a light control film, for example.
- the overetched portion 11 can be formed while both the first inorganic oxide layer 5 and the second inorganic oxide layer 7 can be reliably patterned by etching. Can be suppressed.
- the ratio (H2 / H1) is 0.10 or more and 10.00 or less
- the physical properties (for example, film quality) of the first inorganic oxide layer 5 and the second inorganic oxide layer 7 can be approximated. it can.
- the etching rate R1 for the etching solution of the first inorganic oxide layer 5 and the etching rate R2 for the etching solution of the second inorganic oxide layer 7 can be approximated. Therefore, it is possible to suppress the overetched portion 11 from occurring in either the first inorganic oxide layer 5 or the second inorganic oxide layer 7.
- Japanese Patent Application Laid-Open No. 2003-36037 discloses a silver alloy wiring provided with a silver alloy conductive layer and a conductive protective layer, and the difference between the etching rate of the silver alloy conductive layer and the etching rate of the conductive protective layer. In the silver alloy conductive layer, side etching portions (over-etching portions) are disclosed.
- Japanese Patent Laid-Open No. 2003-36037 discloses an over-etched portion in the first inorganic oxide layer or the second inorganic oxide layer as described in the column “Problems to be Solved by the Invention” above. It is not a thing.
- the hydrogen atom content H1 in the first inorganic oxide layer and the hydrogen atom content H2 in the second inorganic oxide layer are both 5 ⁇ 10 19 atoms / cm. If it is 3 or more and 8,000 ⁇ 10 19 atoms / cm 3 or less, excellent wet heat durability can be maintained.
- this light transmissive film 1 if at least one of the first inorganic oxide layer 5 and the second inorganic oxide layer 7 contains indium oxide, both good etching property and environmental resistance are achieved. can do.
- both the first inorganic oxide layer 5 and the second inorganic oxide layer 7 are amorphous, patterning by etching can be easily performed.
- the metal layer 6 is a metal layer containing silver or a silver alloy, the average reflectance of near infrared rays is high, and heat rays such as sunlight can be efficiently blocked.
- the metal layer 6 is a metal layer containing silver or a silver alloy, the average reflectance of near infrared rays is high, and heat rays such as sunlight can be efficiently blocked.
- the ratio (T2 / T1) of the thickness T2 of the second inorganic oxide layer 7 to the thickness T1 of the first inorganic oxide layer 5 is 0.5 or more and 1.5 or less. If it is, degradation of the metal layer 6 can be suppressed.
- the 1st inorganic oxide layer 5 and the 2nd inorganic oxide layer 7 further contain the carbon atom, Content H1 of the hydrogen atom in the 1st inorganic oxide layer 5 And the total content (H1 + C1) of the carbon atom content C1 and the total content (H2 + C2) of the hydrogen atom content H2 and the carbon atom content C2 in the second inorganic oxide layer 7 are both 6 ⁇ 10 19 atoms / cm 3 or more and 10,000 ⁇ 10 19 atoms / cm 3 or less, the light-transmitting inorganic layer 4 is excellent in amorphousness and can maintain etching property more reliably. it can.
- both inorganic oxides in the first inorganic oxide layer 5 and the second inorganic oxide layer 7 are exemplified by ITO.
- the inorganic oxide in one contains ITO
- the inorganic oxide on the other side can contain inorganic oxides other than ITO (for example, TiOx, IZO, IGO, IGZO, etc.).
- a light-transmitting inorganic layer 4 is provided on a transparent substrate 2, but although not shown, a light-transmitting inorganic layer is further provided below the transparent substrate 2.
- a layer 4 can also be provided. That is, the light-transmitting film 1 can include the protective layer 3 and the light-transmitting inorganic layer 4 in order on both the upper and lower sides of the transparent substrate 2.
- the protective layer 3 is interposed between the transparent substrate 2 and the first inorganic oxide layer 5.
- the first inorganic oxide layer 5 can be disposed directly on the upper surface of the transparent substrate 2. That is, the light transmissive film 1 includes a transparent substrate 2, a first inorganic oxide layer 5, a metal layer 6, and a second inorganic oxide layer 7 in this order.
- the light transmissive film 1 does not include the protective layer 3.
- the first inorganic oxide layer 5 is directly disposed on the upper surface of the protective layer 3.
- the inorganic layer 13 can be interposed between the protective layer 3 and the first inorganic oxide layer 5.
- the inorganic layer 13 is an optical adjustment layer (second optical adjustment layer) that adjusts the optical properties of the light transmissive film 1 so as to suppress the visual recognition of the wiring pattern in the light transmissive inorganic layer 4 together with the protective layer 3. .
- the inorganic layer 13 has a film shape (including a sheet shape), and is disposed on the entire upper surface of the protective layer 3 so as to be in contact with the upper surface of the protective layer 3.
- the inorganic layer 13 has predetermined optical properties, and is prepared from inorganic materials such as oxides and fluorides, for example.
- the thickness of the inorganic layer 13 is 1 nm or more, preferably 5 nm or more, more preferably 10 nm or more, and for example, 80 nm or less, preferably 40 nm or less, more preferably 25 nm or less.
- Example 1 Preparation of film substrate and formation of protective layer
- a transparent substrate made of a long polyethylene terephthalate (PET) film and having a thickness of 50 ⁇ m was prepared.
- the water content in the prepared transparent base material was 19 microgram / cm ⁇ 2 >, and content with respect to the transparent base material of water was also 0.27 mass%.
- an ultraviolet curable resin made of an acrylic resin was applied to the upper surface of the transparent substrate, and cured by ultraviolet irradiation to form a protective layer made of a cured resin layer and having a thickness of 2 ⁇ m.
- the transparent base material roll with a protective layer provided with a transparent base material and a protective layer was obtained.
- the transparent substrate roll with a protective layer was placed in a vacuum sputtering apparatus and allowed to stand, and was evacuated (degassing treatment) until the atmospheric pressure when not transported was 4 ⁇ 10 ⁇ 3 Pa.
- a part of the transparent substrate with a protective layer was transported without introducing the sputtering gas (Ar and O 2 ), and it was confirmed that the atmospheric pressure increased to 2 ⁇ 10 ⁇ 2 Pa. Thereby, it was confirmed that a sufficient amount of gas remained in the transparent substrate roll with a protective layer.
- a first inorganic oxide layer made of an indium tin oxide layer and having a thickness of 42 nm was formed on the upper surface of the cured resin layer by sputtering.
- the lower surface of the transparent substrate roll with a protective layer (specifically, the lower surface of the transparent substrate) is brought into contact with a ⁇ 5 ° C. cooling roll for protection.
- the layered transparent substrate roll was cooled.
- a metal layer made of an Ag—Pd alloy and having a thickness of 8 nm was formed on the upper surface of the first inorganic oxide layer by sputtering.
- an Ag—Pd target (Pd content ratio: 0.5 mass%) was sputtered using a direct current (DC) power source as a power source in a vacuum atmosphere at a pressure of 0.3 Pa into which Ar was introduced.
- DC direct current
- a second inorganic oxide layer made of ITO and having a thickness of 40 nm was formed on the upper surface of the metal layer by sputtering.
- a direct current (DC) power source is used to obtain 10% by mass.
- a target made of a sintered body of tin oxide and 90% by mass of indium oxide was sputtered.
- the time required from the start of the formation of the first inorganic oxide layer to the completion of the formation of the second inorganic oxide layer is 3.5. Minutes.
- Example 2 After setting the transparent substrate roll with a protective layer in the vacuum sputtering apparatus, the pressure during non-conveyance was changed to 4 ⁇ 10 ⁇ 4 Pa, and sintering of 12% by mass of tin oxide and 88% by mass of indium oxide was performed.
- the first inorganic oxide layer and the second inorganic oxide layer were formed using a target composed of a body, and the time required for forming the light transmissive inorganic layer was changed from 3.5 minutes to 0.7 minutes. In the same manner as in Example 1, a light transmissive film was obtained.
- Example 3 A light-transmitting film was obtained in the same manner as in Example 2 except that the discharge output during sputtering of the Ag—Pd target was reduced by 25% and the thickness of the metal layer was changed to 6 nm.
- Example 4 A light-transmitting film was obtained in the same manner as in Example 2 except that the discharge output during sputtering of the Ag—Pd target was increased by 25% and the thickness of the metal layer was changed to 10 nm.
- Comparative Example 1 After setting the transparent substrate roll with the protective layer in the vacuum sputtering apparatus, the pressure during non-transport is changed from 4 ⁇ 10 ⁇ 3 Pa to 9 ⁇ 10 ⁇ 5 Pa, and the formation of the light-transmitting inorganic layer A light-transmitting film was obtained in the same manner as in Example 1 except that the time required for was changed from 3.5 minutes to 180 minutes.
- the thickness of the substrate was measured using a film thickness meter (Digital Dial Gauge DG-205 manufactured by Peacock).
- the first inorganic oxide was analyzed by secondary ion mass spectrometry using a secondary ion mass spectrometer (device name “PHI ADEPT-1010”, manufactured by ULVAC-PHI).
- the hydrogen atom and carbon atom content (H1, C1) in the layer was measured.
- the content (H1) of hydrogen atoms and the content (C1) of carbon atoms in the central portion in the thickness direction of the first inorganic oxide layer were measured by secondary ion mass spectrometry.
- the hydrogen atom content (H2) and the carbon atom content (C2) in the second inorganic oxide layer were also carried out in the same manner as in the measurement of the first inorganic oxide layer.
- a photosensitive film (DFR, trade name “RY3310”, manufactured by Hitachi Chemical Co., Ltd.) is arranged on the entire upper surface of the light-transmitting inorganic layer 4, and then, as shown in FIG.
- the photosensitive film corresponding to a non-pattern part was removed by exposing the photomask which has the pattern in which a part and a pattern part correspond to formation, and developing after that.
- the etching resist 13 having the same pattern as the pattern portion was formed on the upper surface of the light transmissive inorganic layer 4 to be the pattern portion.
- the light-transmitting inorganic layer 4 exposed from the etching resist 13 was etched by immersing in an etching solution heated to 40 ° C. (manufactured by ADEKA Corporation, Adeka Kermica SET-500) for 30 seconds.
- the light-transmitting inorganic layer 4 was formed into a wiring pattern having a stripe-shaped pattern portion.
- the width L of the pattern portion was 100 ⁇ m
- the width S of the non-pattern portion (that is, the interval S between adjacent pattern portions) was 100 ⁇ m.
- the presence or absence and the degree of the over-etched portion of the first inorganic oxide layer and the second inorganic oxide layer are observed by TEM, and the etching property is based on the following criteria. Evaluated. In addition, about the 2nd inorganic oxide layer, the overetching part was not observed.
- the following “length in the width direction of the over-etched portion” is the innermost portion of the first inorganic oxide layer eroded inward from the edge of the second inorganic oxide layer. This is the distance D to the part (deepest part).
- a black plate with an adhesive was bonded to the opposite side of the light transmissive inorganic layer of the light transmissive film of each Example and Comparative Example so that no air bubbles would enter.
- a spectrophotometer (“U-4100” manufactured by Hitachi High-Technologies Corporation)
- the light reflectance in the near infrared region (850-2500 nm) was measured at a pitch of 5 nm, and the average reflectance of the light-transmitting inorganic layer was measured. The value (average reflectance) was calculated.
- the light transmissive film is used for an optical device, for example.
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Abstract
Description
光透過性フィルム1は、所定の厚みを有するフィルム形状(シート形状を含む)をなし、厚み方向と直交する所定方向(前後方向および左右方向、すなわち、面方向)に延び、平坦な上面および平坦な下面(2つの主面)を有する。光透過性フィルム1は、例えば、光学装置(例えば、画像表示装置、調光装置)に備えられるタッチパネル用基材や調光パネルなどの一部品であり、つまり、光学装置ではない。すなわち、光透過性フィルム1は、光学装置などを作製するための部品であり、LCDモジュールなどの画像表示素子や、LEDなどの光源を含まず、部品単独で流通し、産業上利用可能なデバイスである。また、光透過性フィルム1は、透明導電性フィルムを含む。
透明基材2は、光透過性フィルム1の最下層であって、光透過性フィルム1の機械強度を確保する支持材である。透明基材2は、光透過性無機層4を、保護層3とともに、支持する。
保護層3は、光透過性無機層4の上面に擦り傷を生じにくくする(すなわち、優れた耐擦傷性を得る)ための、擦傷保護層である。また、保護層3は、図2が参照されるように、光透過性無機層4を後の工程で配線パターンに形成した後に、非パターン部9とパターン部10との相違が認識されないように(すなわち、配線パターンの視認を抑制するように)、光透過性フィルム1の光学物性を調整する光学調整層でもある。
光透過性無機層4は、図2が参照されるように、後の工程で配線パターンに形成して、パターン部10を形成するための導電層である。また、光透過性無機層4は、透明導電層を含んでいる。
第1無機酸化物層5は、後述する金属層6および第2無機酸化物層7とともに、光透過性無機層4に導電性を付与する導電層である。また、第1無機酸化物層5は、透明基材2に含有される水に由来する水素や、保護層3に含有される有機物に由来する炭素が、金属層6に侵出することを防止するバリヤ層でもある。さらに、第1無機酸化物層5は、後述する第2無機酸化物層7とともに、金属層6の可視光反射率を抑制し、光透過性無機層4の可視光透過率を向上させるための光学調整層でもある。
金属層6は、第1無機酸化物層5および第2無機酸化物層7とともに、光透過性無機層4に導電性を付与する導電層である。また、金属層6は、光透過性無機層4の比抵抗を低減する低比抵抗化層でもある。
第2無機酸化物層7は、第1無機酸化物層5および金属層6とともに、光透過性無機層4に導電性を付与する導電層である。また、第2無機酸化物層7は、環境中の酸素や水分などが金属層6に侵出することを防止するバリヤ層でもあり、金属層6の可視光反射率を抑制し、光透過性無機層4の可視光透過率を向上させるための光学調整層でもある。
次に、光透過性フィルム1を製造する方法を説明する。
その後、図2に示すように、エッチングによって、光透過性無機層4を配線パターンに形成する。これによって、保護層3の上に、非パターン部9およびパターン部10を形成する。非パターン部9では、保護層3の上面がパターン部10から露出する。
この光透過性フィルム1によれば、第1無機酸化物層5および第2無機酸化物層7の両方を、エッチングにより確実にパターンニングすることができながら、オーバーエッチング部分11の形成を抑制することができる。
変形例において、上記した一実施形態と同様の部材および工程については、同一の参照符号を付し、その詳細な説明を省略する。
(フィルム基材の用意、および、保護層の形成)
まず、長尺状ポリエチレンテレフタレート(PET)フィルムからなり、厚みが50μmである透明基材を用意した。なお、用意した透明基材における水分量は、19μg/cm2であり、また、水の、透明基材に対する含有量は、0.27質量%でもあった。
次いで、保護層付透明基材ロールを真空スパッタ装置に設置して静置し、未搬送時の気圧が4×10-3Paとなるまで真空排気した(脱ガス処理)。この時、スパッタリングガス(ArおよびO2)を導入しない状態で、保護層付透明基材の一部を搬送し、2×10-2Paまで気圧が上がることを確認した。これにより、保護層付透明基材ロールに十分な量のガスが残存していることを確認した。
Ag-Pd合金からなり、厚みが8nmである金属層を、スパッタリングにより、第1無機酸化物層の上面に形成した。
ITOからなり、厚みが40nmである第2無機酸化物層を、金属層の上面に、スパッタリングにより、形成した。
保護層付透明基材ロールを真空スパッタ装置に設置した後における未搬送時の気圧を、4×10-4Paに変更し、12質量%の酸化スズと88質量%の酸化インジウムとの焼結体からなるターゲットを用いて第1無機酸化物層および第2無機酸化物層を形成し、光透過性無機層の形成に要した時間を、3.5分から0.7分に変更した以外は、実施例1と同様にして光透過性フィルムを得た。
Ag-Pdターゲットをスパッタリングする際の放電出力を25%小さくして、金属層の厚みを6nmに変更した以外は、実施例2と同様にして光透過性フィルムを得た。
Ag-Pdターゲットをスパッタリングする際の放電出力を25%大きくして、金属層の厚みを10nmに変更した以外は、実施例2と同様にして光透過性フィルムを得た。
保護層付透明基材ロールを真空スパッタ装置に設置した後における未搬送時の気圧を、4×10-3Paから、9×10-5Paに変更し、また、光透過性無機層の形成に要した時間を、3.5分から180分に変更した以外は、実施例1と同様にして光透過性フィルムを得た。
(1)厚み
保護層、第1金属酸化物層、金属層および第2金属酸化物の厚みを、透過型電子顕微鏡(日立製作所製 H-7650)を用いた断面観察により測定した。
二次イオン質量分析装置(装置名「PHI ADEPT-1010」、アルバック・ファイ社製)を用いて、二次イオン質量分析法により、第1無機酸化物層における水素原子および炭素原子の含有量(H1、C1)を測定した。具体的には、第1無機酸化物層の厚み方向中央部における水素原子の含有量(H1)および炭素原子の含有量(C1)を、二次イオン質量分析法により、測定した。
JIS K7194(1994年)の4探針法に準拠して測定した光透過性無機層の表面抵抗値と、(1)の厚みの測定にて求めた光透過性無機層の厚みとの積から光透過性無機層の比抵抗を算出した。その結果を表1に示す。
光透過性無機層4の上面全面に、感光性フィルム(DFR、商品名「RY3310」、日立化成社製)を配置し、次いで、図2が参照されるように、非パターン部およびパターン部が形成に対応するパターンを有するフォトマスクを露光し、その後、現像することにより、非パターン部に対応する感光性フィルムを除去した。これにより、パターン部となる光透過性無機層4の上面に、パターン部と同一パターンを有するエッチングレジスト13を形成した。その後、エッチングレジスト13から露出する光透過性無機層4を、40℃に加温したエッチング液(株式会社ADEKA社製、アデカケルミカ SET-500)に30秒浸漬することで、エッチングした。
○:第1無機酸化物層におけるオーバーエッチング部分の幅方向長さDが、10μm未満であった。
△:第1無機酸化物層におけるオーバーエッチング部分の幅方向長さDが、10μm以上、15μm未満であった。
×:第1無機酸化物層におけるオーバーエッチング部分の幅方向長さDが、15μm以上であった。
ヘーズメーター(スガ試験機社製、装置名「HGM-2DP)を用いて、全光線透過率を測定し、可視光透過率とした。
2 透明基材
4 光透過性無機層
5 第1無機酸化物層
6 金属層
7 第2無機酸化物層
Claims (6)
- 順に、透明基材と、光透過性無機層とを備え、
前記透明基材は、高分子フィルムからなり、
前記光透過性無機層は、順に、第1無機酸化物層と、金属層と、第2無機酸化物層とを備え、
前記光透過性無機層は、導電性を有し、
前記第1無機酸化物層および第2無機酸化物層は、水素原子を含有し、
前記第2無機酸化物層における水素原子の含有量H2の、前記第1無機酸化物層における水素原子の含有量H1に対する比(H2/H1)が、0.10以上、10.00以下であることを特徴とする、光透過性フィルム。 - 前記第1無機酸化物層における水素原子の含有量H1、および、前記第2無機酸化物層における水素原子の含有量H2が、ともに、5×1019atoms/cm3以上、8,000×1019atoms/cm3以下であることを特徴とする、請求項1に記載の光透過性フィルム。
- 前記第1無機酸化物層および前記第2無機酸化物層のうち、少なくとも一方が、酸化インジウムを含有することを特徴とする、請求項1に記載の光透過性フィルム。
- 前記第1無機酸化物層および前記第2無機酸化物層のいずれもが、非晶質であることを特徴とする、請求項1に記載の光透過性フィルム。
- 前記第2無機酸化物層の厚みT2の、前記第1無機酸化物層の厚みT1に対する比(T2/T1)が、0.5以上、1.5以下であることを特徴とする、請求項1に記載の光透過性フィルム。
- 前記第1無機酸化物層および前記第2無機酸化物層は、炭素原子をさらに含有しており、
前記第1無機酸化物層における水素原子の含有量H1と炭素原子の含有量C1との合計含有量(H1+C1)、および、前記第2無機酸化物層における水素原子の含有量H2と炭素原子の含有量C2との合計含有量(H2+C2)が、ともに、6×1019atoms/cm3以上、10,000×1019atoms/cm3以下であることを特徴とする、請求項1に記載の光透過性フィルム。
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- 2016-02-10 JP JP2016023802A patent/JP5976970B1/ja active Active
- 2016-02-18 WO PCT/JP2016/054678 patent/WO2016136578A1/ja active Application Filing
- 2016-02-18 CN CN201910841379.1A patent/CN110641108A/zh active Pending
- 2016-02-18 EP EP16755325.4A patent/EP3263327A4/en active Pending
- 2016-02-18 US US15/550,553 patent/US20180040393A1/en not_active Abandoned
- 2016-02-18 KR KR1020177003646A patent/KR102388000B1/ko active IP Right Grant
- 2016-02-18 CN CN201680002183.8A patent/CN106794670B/zh active Active
- 2016-02-22 TW TW105105163A patent/TWI716379B/zh active
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Also Published As
Publication number | Publication date |
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CN110641108A (zh) | 2020-01-03 |
TWI716379B (zh) | 2021-01-21 |
JP2016210192A (ja) | 2016-12-15 |
US20180040393A1 (en) | 2018-02-08 |
KR20170120556A (ko) | 2017-10-31 |
CN106794670A (zh) | 2017-05-31 |
JP2016155377A (ja) | 2016-09-01 |
JP5976970B1 (ja) | 2016-08-24 |
JP6713866B2 (ja) | 2020-06-24 |
EP3263327A4 (en) | 2018-10-31 |
CN106794670B (zh) | 2019-09-20 |
KR102388000B1 (ko) | 2022-04-18 |
TW201637848A (zh) | 2016-11-01 |
EP3263327A1 (en) | 2018-01-03 |
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